yo dude i was in the same position yesterday but my m8 hold me all i need to know and for a marker he said go for either a
ION
or
PMR
both cheap both can upgrade and if they come with a short trigger just buy a double triggle there like £10 £20 but its total worth it.
but do what every1 says buy a mask hopper/loader gas tank Then ur marker/gun
Gazza